嗜热厌氧菌乙醇耐受机制的研究进展

The mechanism of ethanol tolerance in thermophilic anaerobic bacteria:current State and prospects

生物能源因其原料具有来源丰富、价格低廉和可再生的优点,作为可替代化石能源的潜在能源受到世界各国的高度重视。有些嗜热厌氧菌因为具有木质纤维素降解能力和高温发酵的成本优势,被视为生物质转化乙醇等能源物质的理想微生物而成为近年来研究的热点,但乙醇耐受性较低是限制嗜热厌氧菌在工业化生产中应用的主要因素之一。本文从以下三个方面介绍嗜热厌氧菌乙醇耐受机制的研究进展:(1)嗜热厌氧菌生产乙醇的代谢途径;(2)嗜热厌氧菌的乙醇耐受机制;(3)提高嗜热厌氧菌乙醇耐受性的方法。

Bio-energy,being a candidate to replace the traditional fossil energy,has been explored in many countries,because it′s raw material is cheap,abundant,and recyclable.Thermophilic anaerobic bacteria is a group of excellent strains in the research of bio-energy industry in current years due to its unique characters in decomposing lignocelluloses and its superior advantages in fermenting at high temperature.However,the amount of the ethanol tolerance of these bacteria is lower than we can use in reality.The current state and prospects of the studies on the mechanism of ethanol tolerance of thermophilic anaerobic bacteria are discussed in the following three aspects： first,the metabolic pathway to produce ethanol;second,the mechanism of ethanol tolerance;thirdly,the methods to improve ethanol tolerance.